//import java.util.Scanner;
//public class Test {
//    public static void main(String[] args) {
//        Scanner scanner = new Scanner(System.in);
//        while (scanner.hasNextInt()) {
//            int x = scanner.nextInt();
//            int y = scanner.nextInt();
//            Data data = new Data(x, y);
//            System.out.println(data.getX() + data.getY());
//        }
//    }
//}
//class Data {
//    private int x;
//    private int y;
//    private Data(int x, int y) {
//        x = x;
//        y = y;
//    }
//
//    private int getX() {
//        return x;
//    }
//    private int getY() {
//        return y;
//    }
//}
//修改上述代码

import java.util.Scanner;
public class Test {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextInt()) {
            int x = scanner.nextInt();
            int y = scanner.nextInt();
            Data data = new Data(x, y);
            System.out.println(data.getX() + data.getY());
        }
    }
}
class Data {
    private int x;
    private int y;

    public Data(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }
}